0.6 nozzle and issue with calibration cube

Snapmaker 2.0
1

Hello,

I changed the nozzle from 0.4 to 0.6.
Easy process, all went well.

I am doing a calibration cube test and below are the results which are kind of wierd.

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I did:

  • extruder calibration
  • change cura extruder size
  • using default settings with 0.4 or 0.3mm layer
  • used 2 different filament
  • bed calibration
  • try ± 0.05mm adjustment in case.
  • try couple of print speed.

If you look closely.
First layer is good
The layer where the Y is printed seems homogeneous. But the layer at the bottom and top of the y are larger, but it seems only for the Y side.
The other sides are ok.
I have 3 top and bottom layer defined in cura, however the count of the dodgy layer is more around 5, so probably not related to the settings.

Anything I could try ?
Any idea what could be the issue here?
Thanks

2

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3

Looks like it might be over extruding the corners when it is going faster, Although I would think X would also show some of this as well. The mass of the bed might exacerbate the problem in Y. First layer is probably better because your slicer is almost certainly set to print first layer more slowly for better adhesion. I’m guessing the larger nozzle needs a different K value for linear advance than the .4 due to different flow rate. Have you tried printing a LA test pattern to find an optimal K value? Pretty decent explaination here https://all3dp.com/2/linear-advance-cura-marlin/